release: promote landing version deploy fix

[jb-thery]

Summary

• promote landing deploy tag fetching to main
• restores and preserves Ragmir v2.4.0 on production landing deploys

Validation

• PR ci: fetch tags for landing version deploys #59 checks passed
• develop CI, CodeQL, and staging landing deploy passed

Release impact

• workflow-only change; no npm release expected
• production landing deploy should resolve the latest git tag and display Ragmir v2.4.0